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Summary of Significant Accounting Policies (Unaudited) (Details)
 3 Months Ended 6 Months Ended
Jul. 31, 2024
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
segment
shares
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
shares
Summary of Significant Accounting Policies (Unaudited)            
Common stock, per share | $ / shares $ 10          
Proceeds from Issuance of Common Stock $ 54,594,730          
Payments of Stock Issuance Costs $ 2,400,000          
Stock Issued During Period Shares New Issues To Charitable Foundation | shares 100,000          
Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP | shares 444,758          
Percent of employee stock ownership plan stock over total common stock issued 8.00%          
Common stock, issued (in shares) | shares 5,559,473 5,559,473   5,559,473   5,559,473
Net Proceeds From The Offering To The Bank $ 26,097,000          
Employee Stock Ownership Plan (ESOP), Loan Amount 4,447,580          
Net Proceeds Of The Offering, Amount Retained $ 21,400,000          
Number of reporting segments | segment       1    
Bank deposit accounts in excess of FDIC limit of $250,000 per institution   $ 18,329,000   $ 18,329,000   $ 27,315,000
Deposit Limit   250,000   250,000   250,000
Reserve Requirement With Federal Reserve Bank   0   0   0
Held-to-maturity securities held   0   0   0
Trading securities held   0   0   0
Allowance for credit losses for available-for-sale securities   0   0   0
Accrued interest receivable on available-for-sale securities   382,000   382,000   348,000
Accrued interest receivable related to loans   1,831,000   1,831,000   1,619,000
Bank Owned Life Insurance   7,561,000   7,561,000   10,685,000
Appreciation in cash surrender value   87,000 $ 98,000 176,000 $ 181,000  
Real Estate Owned   42,000   42,000   $ 42,000
Interest and/or penalties recognized   0 0 0 0  
Dilutive securities       0    
Advertising and promotional expenses   $ 25,000 $ 48,000 $ 44,000 $ 76,000  
Fifth District Saving Bank            
Summary of Significant Accounting Policies (Unaudited)            
Ownership Percentage 100.00%          
Fifth District Saving Bank            
Summary of Significant Accounting Policies (Unaudited)            
Number of shares sold on the conversion | shares 5,459,473          
Minimum | Building and Improvements            
Summary of Significant Accounting Policies (Unaudited)            
Estimated useful lives   15 years   15 years    
Minimum | Furniture and Fixtures            
Summary of Significant Accounting Policies (Unaudited)            
Estimated useful lives   5 years   5 years    
Maximum | Building and Improvements            
Summary of Significant Accounting Policies (Unaudited)            
Estimated useful lives   40 years   40 years    
Maximum | Furniture and Fixtures            
Summary of Significant Accounting Policies (Unaudited)            
Estimated useful lives   10 years   10 years    
Commercial loans            
Summary of Significant Accounting Policies (Unaudited)            
Percentage of loan balance purchased (in percent)   100.00%   100.00%    
Percentage of loan balance remitted to seller (in percent)   97.00%   97.00%    
Number Of Days Of delinquency Considered For Replacement Of delinquent Loans With Performing Loans By Seller       90 days    
Percentage of loan balance that the seller establishes reserve deposit account (in percent)   3.00%   3.00%